Question

tính nhanh: 2 1phan 2 +3 1 phần 18+ 7 5 phần 36

Answer 1

\(2\frac{1}{2}+3\frac{1}{18}+7\frac{5}{36}\)

\(=\frac{5}{2}+\frac{55}{18}+\frac{257}{36}\)

\(=\frac{90}{36}+\frac{110}{36}+\frac{257}{36}\)

\(=\frac{90+110+257}{36}=\frac{457}{36}\)

Answer 2

\(2\frac{1}{2}+3\frac{1}{18}+7\frac{5}{36}\)

\(=\left(2+3+7\right)\left(\frac{1}{2}+\frac{1}{18}+\frac{5}{36}\right)\)

\(=12\left(\frac{1}{2}+\frac{1}{18}+\frac{5}{36}\right)\)

\(=12\frac{25}{36}=\frac{457}{36}\)

Answer 3

\(2\frac{1}{2}+3\frac{1}{18}\)\(+7\frac{5}{36}\)

\(=\frac{5}{2}+\frac{55}{18}+\frac{257}{36}\)

\(=\frac{90}{36}+\frac{110}{36}+\frac{257}{36}\)

\(=\frac{90+110+257}{36}\)

\(=\frac{457}{36}\)

Answer 4

\(\frac{457}{36}\)

k mik nha !

Answer 5

2\(\frac{1}{2}\)+ 3\(\frac{1}{18}\)+ 7\(\frac{5}{36}\)=( 2+ 3+ 7)+( \(\frac{1}{2}\)+ \(\frac{1}{18}\)+ \(\frac{5}{36}\)).

=[( 3+ 7)+ 2]+( \(\frac{18}{36}\)+ \(\frac{2}{36}\)+ \(\frac{5}{36}\)).

=( 10+ 2)+( \(\frac{20}{36}\)+ \(\frac{5}{36}\)).

= 12+ \(\frac{25}{36}\).

= 12\(\frac{25}{36}\).